基于PSInSAR技术的现代黄河三角洲地面沉降监测与分析  

Monitoring and Analysis of Ground Subsidence in the Modern Yellow River Delta Area Based on PSInSAR Technique

作　　者：张金芝[1,2] 黄海军[1] 刘艳霞[1] 刘勇[1,2] 马立杰[1] 

机构地区：[1]中国科学院海洋研究所海洋地质与环境重点实验室,山东青岛266071 [2]中国科学院大学,北京100049

出　　处：《地理科学》2013年第7期831-836,共6页Scientia Geographica Sinica

基　　金：中国科学院知识创新工程重要方向项目(KZCX2-EW-207);海洋公益性行业科研专项经费项目(201005010)资助

摘　　要：地面沉降是现代黄河三角洲地区主要的地质灾害之一,利用PSInSAR技术对覆盖现代黄河三角洲部分地区的10景ERS1/2数据进行处理,获得该研究区的地面沉降范围、沉降速率和形变时间序列情况。选取3个地面沉降范围和速率相对较大的区域进行重点分析,同时将监测结果与相应时间段的居民区分布图和油田分布图进行叠加分析,结果表明,地面沉降与石油开采、地表载荷增加具有较强的相关性。利用水准观测数据对获得的监测结果进行精度验证,结果显示PSInSAR监测结果与水准观测数据吻合,中误差达到mm级。Currently,with the influence of long term exploitation of oil,gas,groundwater and brine resources,the increase of surface load and the compaction of recent sediments,ground subsidence has become one of the main geological hazards of the modern Yellow River Delta,China.Wetlands are broadly distributed,and most areas are covered by vegetation in this region,which make monitoring more difficultly.This article introduces monitoring of ground subsidence in the modern Yellow River Delta area using PSInSAR technique.To carry out experiment 10 ERS1/2 images during June 1992 and August 1995 were collected,and with Hooper’s PSInSAR algorithm model,more than 80 000 PS points were selected.3.0 was chosen as the threshold of standard deviation to screen the PS points,and PS points were drop out which were affected by noise.PS points that in Dongying airport were chosen as reference points to correct the results,then the mean subsided velocity map and the deformation quantity in time series were derived.Ground subsidence phenomenon are widely distributed in the modern Yellow River Delta area.The mean subsided velocity is about 4.4 mm/a in most coastal area,mean subsided velocity of Shengli Oil Production Plant and its surrounding areas is 10.1mm/a.In the west city district of Dongying the value is 7.1 mm/a and in the east city district of Dongying the value is 7.4 mm/a.Subsided velocity map,the residential map and oilfield distribution map were overlapped to analyze the relationship between them.The results show that subsided velocity of the modern Yellow River Delta has high correlation with exploitation of oil,the increase of surface load and natural compaction of sediments.The accuracy of PSInSAR technique was verified by traditional Leveling data.Four leveling points were taken near PS points.Although the monitoring time interval and location of Leveling points was not in full accord match with PS points,the monitoring results gotten by PSInSAR technique was consistent with the leveling results.The subsided quantity curv

关 键 词：INSAR 永久散射体雷达干涉测量 现代黄河三角洲 地面沉降 

分 类 号：TP722.6[自动化与计算机技术—检测技术与自动化装置]